Not intended for the earlier version of the GC320.Remote requires an A23 12 volt battery, not included.

To begin, turn the power switch on to the main unit. Next, find the small hole beside the power switch, insert a small paperclip in and you will feel reset button depress. The red LED on the unit should begin blinking. While the LED is blinking, press and hold any of the call buttons on the new remote. The caller should respond by playing the selected sound within 3-5 seconds.